diff --git a/configure.py b/configure.py
index 7aae036d..09e1cb04 100644
--- a/configure.py
+++ b/configure.py
@@ -1441,7 +1441,7 @@ config.libs = [
             Object(Matching, "game/m_mail_check.c"),
             Object(Matching, "game/m_mail_check_ovl.c"),
             Object(Matching, "game/m_mail_password_check.c"),
-            Object(NonMatching, "game/m_mailbox_ovl.c"),
+            Object(Matching, "game/m_mailbox_ovl.c"),
             Object(Matching, "game/m_malloc.c"),
             Object(Matching, "game/m_map_ovl.c"),
             Object(Matching, "game/m_mark_room.c"),
diff --git a/include/m_mailbox_ovl.h b/include/m_mailbox_ovl.h
index a1d66da5..48929a83 100644
--- a/include/m_mailbox_ovl.h
+++ b/include/m_mailbox_ovl.h
@@ -3,6 +3,7 @@
 
 #include "types.h"
 #include "m_mailbox_ovl_h.h"
+#include "m_submenu_ovl.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/game/m_mailbox_ovl.c b/src/game/m_mailbox_ovl.c
new file mode 100644
index 00000000..6c1a5005
--- /dev/null
+++ b/src/game/m_mailbox_ovl.c
@@ -0,0 +1,233 @@
+#include "m_mailbox_ovl.h"
+
+#include "m_common_data.h"
+#include "sys_matrix.h"
+#include "m_tag_ovl.h"
+#include "m_player_lib.h"
+#include "m_inventory_ovl.h"
+#include "m_hand_ovl.h"
+
+static mMB_Ovl_c mail_ovl_data;
+
+static int mMB_get_last_mail_idx(void) {
+    Mail_c* mail = &Common_Get(now_home)->mailbox[HOME_MAILBOX_SIZE];
+    int idx = HOME_MAILBOX_SIZE;
+
+    do {
+        mail--;
+        idx--;
+    } while (mMl_check_not_used_mail(mail) && idx != 0);
+
+    return idx;
+}
+
+static void mMB_move_Move(Submenu* submenu, mSM_MenuInfo_c* menu_info) {
+    submenu->overlay->move_Move_proc(submenu, menu_info);
+}
+
+static void mMB_move_Play(Submenu* submenu, mSM_MenuInfo_c* menu_info) {
+    if (!menu_info->open_flag) {
+        submenu->overlay->tag_ovl->chg_tag_func_proc(submenu, mTG_TABLE_MBOX, mTG_TYPE_NONE, mMB_get_last_mail_idx(), 0.0f, 0.0f);
+        menu_info->open_flag = TRUE;
+    }
+    
+    submenu->overlay->menu_control.tag_move_func(submenu, menu_info);
+}
+
+static void mMB_move_Wait(Submenu* submenu, mSM_MenuInfo_c* menu_info) {
+    mSM_MenuInfo_c* next_menu = &submenu->overlay->menu_info[menu_info->next_menu_type];
+    mMB_Ovl_c* mailbox_ovl = submenu->overlay->mailbox_ovl;
+
+    if (next_menu->proc_status == mSM_OVL_PROC_MOVE && next_menu->next_proc_status == mSM_OVL_PROC_END) {
+        if (next_menu->menu_type == mSM_OVL_BOARD) {
+            submenu->overlay->move_chg_base_proc(menu_info, mSM_MOVE_IN_LEFT);
+        } else if (next_menu->data1 == 0) {
+            menu_info->proc_status = mSM_OVL_PROC_PLAY;
+            menu_info->next_proc_status = mSM_OVL_PROC_PLAY;
+            mailbox_ovl->open_flag = FALSE;
+        } else {
+            submenu->overlay->move_chg_base_proc(menu_info, mSM_MOVE_OUT_LEFT);
+            sAdo_SysTrgStart(SE_FLAG_15(NA_SE_ZOOMDOWN_SHORT));
+        }
+    }
+}
+
+static void mMB_move_End(Submenu* submenu, mSM_MenuInfo_c* menu_info) {
+    mPlib_request_main_mail_land_from_submenu();
+    submenu->overlay->move_End_proc(submenu, menu_info);
+}
+
+static void mMB_mailbox_ovl_move(Submenu* submenu) {
+    static mSM_MOVE_PROC ovl_move_proc[] = {
+        // clang-format off
+        mMB_move_Move,
+        mMB_move_Play,
+        mMB_move_Wait,
+        (mSM_MOVE_PROC)none_proc1,
+        mMB_move_End,
+        // clang-format on
+    };
+    
+    mSM_MenuInfo_c* menu_info = &submenu->overlay->menu_info[mSM_OVL_MAILBOX];
+    Submenu_Overlay_c* ovl = submenu->overlay;
+
+    menu_info->pre_move_func(submenu);
+    (*ovl_move_proc[menu_info->proc_status])(submenu, menu_info);
+
+    switch (menu_info->proc_status) {
+        case mSM_OVL_PROC_PLAY:
+            ovl->menu_control.animation_flag = TRUE;
+            break;
+        case mSM_OVL_PROC_MOVE:
+            ovl->menu_control.animation_flag = FALSE;
+            break;
+    }
+}
+
+extern Gfx pos_win_mode[];
+extern Gfx pos_win_model[];
+extern Gfx pos_yaji_wakuT_model[];
+
+static void mMB_set_frame_dl(Submenu* submenu, GRAPH* graph, mSM_MenuInfo_c* menu_info, f32 pos_x, f32 pos_y) {
+    int tex_x;
+    int tex_y;
+
+    Matrix_scale(16.0f, 16.0f, 1.0f, 0);
+    Matrix_translate(pos_x, pos_y, 140.0f, 1);
+
+    OPEN_POLY_OPA_DISP(graph);
+
+    gSPDisplayList(POLY_OPA_DISP++, pos_win_mode);
+    gSPMatrix(POLY_OPA_DISP++, _Matrix_to_Mtx_new(graph), G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_MODELVIEW);
+    gDPTileSync(POLY_OPA_DISP++);
+    
+    tex_x = -submenu->overlay->menu_control.texture_pos[0] * 4.0f;
+    tex_y = -submenu->overlay->menu_control.texture_pos[1] * 4.0f;
+    gDPSetTileSize_Dolphin(POLY_OPA_DISP++, G_TX_RENDERTILE, (u8)tex_x, (u8)tex_y, 32, 32);
+    gSPDisplayList(POLY_OPA_DISP++, pos_win_model);
+    
+    if (submenu->overlay->mailbox_ovl->display_flag) {
+        Matrix_translate(20.0f, 10.0f, 0.0f, 1);
+        gSPMatrix(POLY_OPA_DISP++, _Matrix_to_Mtx_new(graph), G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_MODELVIEW);
+        gSPDisplayList(POLY_OPA_DISP++, pos_yaji_wakuT_model);
+    }
+
+    CLOSE_POLY_OPA_DISP(graph);
+}
+
+extern Gfx inv_item_mode[];
+
+static void mMB_set_mail(Submenu* submenu, GRAPH* graph, f32 pos_x, f32 pos_y) {
+    Mail_c* mail = Common_Get(now_home)->mailbox;
+    mIV_Ovl_c* inv_ovl = submenu->overlay->inventory_ovl;
+    mMB_Ovl_c* mailbox_ovl = submenu->overlay->mailbox_ovl;
+    mTG_tag_c* tag = &submenu->overlay->tag_ovl->tags[0];
+    int check;
+    f32 scale;
+    int i;
+    u16 mark;
+    int mark_flag;
+    f32 pos[2];
+
+    if (inv_ovl->remove_timer > 0 && (tag->table == mTG_TABLE_MBOX || mailbox_ovl->mark_flag == TRUE)) {
+        if (mailbox_ovl->mark_flag == TRUE) {
+            mark = mailbox_ovl->mark_bitfield;
+        } else {
+            mark = (1 << submenu->overlay->tag_ovl->get_table_idx_proc(tag));
+        }
+    } else {
+        mark = 0;
+    }
+
+    OPEN_POLY_OPA_DISP(graph);
+
+    gSPDisplayList(POLY_OPA_DISP++, inv_item_mode);
+
+    CLOSE_POLY_OPA_DISP(graph);
+
+    for (i = 0; i < HOME_MAILBOX_SIZE; i++) {
+        if (mMl_check_not_used_mail(mail) != TRUE) {
+            if ((mark & (1 << i)) != 0) {
+                scale = inv_ovl->remove_timer / 24.0f;
+            } else {
+                scale = 1.0f;
+            }
+
+            if ((mailbox_ovl->mark_bitfield & (1 << i)) != 0 && mailbox_ovl->mark_flag == FALSE) {
+                mark_flag = TRUE;
+            } else {
+                mark_flag = FALSE;
+            }
+
+            submenu->overlay->tag_ovl->set_hand_pos_proc(submenu, pos, mTG_TABLE_MBOX, i);
+            submenu->overlay->draw_mail_proc(graph, pos_x + pos[0], pos_y + pos[1], scale, mail, TRUE, FALSE, mark_flag);
+        }
+
+        mail++;
+    }
+}
+
+static void mMB_set_dl(GRAPH* graph, mSM_MenuInfo_c* menu_info, Submenu* submenu, GAME* game) {
+    f32 pos_x = menu_info->position[0];
+    f32 pos_y = menu_info->position[1];
+
+    mMB_set_frame_dl(submenu, graph, menu_info, pos_x, pos_y);
+    mMB_set_mail(submenu, graph, pos_x, pos_y);
+    submenu->overlay->menu_control.tag_draw_func(submenu, game, mSM_OVL_MAILBOX);
+}
+
+static void mMB_mailbox_ovl_draw(Submenu* submenu, GAME* game) {
+    GRAPH* graph = game->graph;
+    mSM_MenuInfo_c* menu_info = &submenu->overlay->menu_info[mSM_OVL_MAILBOX];
+
+    menu_info->pre_draw_func(submenu, game);
+    mMB_set_dl(graph, menu_info, submenu, game);
+}
+
+extern void mMB_mailbox_ovl_set_proc(Submenu* submenu) {
+    Submenu_Overlay_c* ovl = submenu->overlay;
+    mSM_Control_c* ctrl = &ovl->menu_control;
+    mSM_MenuInfo_c* menu_info = &ovl->menu_info[mSM_OVL_MAILBOX];
+
+    ctrl->menu_move_func = mMB_mailbox_ovl_move;
+    ctrl->menu_draw_func = mMB_mailbox_ovl_draw;
+    if (ovl->hand_ovl != NULL && menu_info->next_proc_status != mSM_OVL_PROC_END) {
+        submenu->overlay->hand_ovl->set_hand_func(submenu);
+    }
+}
+
+static void mMB_mailbox_ovl_init(Submenu* submenu) {
+    Submenu_Overlay_c* ovl = submenu->overlay;
+    mSM_MenuInfo_c* menu_info = &ovl->menu_info[mSM_OVL_MAILBOX];
+    mMB_Ovl_c* mailbox_ovl = ovl->mailbox_ovl;
+
+    ovl->menu_control.animation_flag = FALSE;
+    mailbox_ovl->mark_bitfield = 0;
+    mailbox_ovl->mark_flag = FALSE;
+    menu_info->proc_status = mSM_OVL_PROC_MOVE;
+    menu_info->move_drt = mSM_MOVE_IN_LEFT;
+    menu_info->next_proc_status = mSM_OVL_PROC_PLAY;
+    ovl->mailbox_ovl->open_flag = TRUE;
+}
+
+static void mMB_mailbox_ovl_data_init(Submenu* submenu) {
+    mem_clear((u8*)submenu->overlay->mailbox_ovl, sizeof(mMB_Ovl_c), 0);
+}
+
+extern void mMB_mailbox_ovl_construct(Submenu* submenu) {
+    Submenu_Overlay_c* ovl = submenu->overlay;
+
+    if (ovl->mailbox_ovl == NULL) {
+        mem_clear((u8*)&mail_ovl_data, sizeof(mail_ovl_data), 0);
+        ovl->mailbox_ovl = &mail_ovl_data;
+        mMB_mailbox_ovl_data_init(submenu);
+        submenu->overlay->mailbox_ovl->get_last_mail_idx_proc = mMB_get_last_mail_idx;
+    }
+
+    mMB_mailbox_ovl_init(submenu);
+    mMB_mailbox_ovl_set_proc(submenu);
+}
+
+extern void mMB_mailbox_ovl_destruct(Submenu* submenu) {
+    submenu->overlay->mailbox_ovl = NULL;
+}